CN101499808A - Mechanical tuning broadcast receiver - Google Patents
Mechanical tuning broadcast receiver Download PDFInfo
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- CN101499808A CN101499808A CNA2008102412068A CN200810241206A CN101499808A CN 101499808 A CN101499808 A CN 101499808A CN A2008102412068 A CNA2008102412068 A CN A2008102412068A CN 200810241206 A CN200810241206 A CN 200810241206A CN 101499808 A CN101499808 A CN 101499808A
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Abstract
The invention discloses a mechanical tuning broadcast receiver, comprising a signal processor and a variable capacitance module, an inductor and a frequency band selection module; the variable capacitance module, the inductor and the frequency band selection module are respectively connected with the signal processor; the variable module and the inductor carry out oscillation and transmit the oscillation frequency to the signal processor; the frequency band selection module outputs frequency band selection signals to the signal processor; the signal processor carries out frequency division to the oscillation frequency according to the frequency band selection signals and carries out frequency mixing with the received signals so as to obtain medium-frequency signals; and audio signals in the medium-frequency signals are taken out by frequency discrimination or detection. The mechanical tuning broadcast receiver has less external elements and simple structure, only uses two to three procedures to make testing and debugging; the debugging saves time; as the inserting pieces are few and the debugging is simple, the assembly procedure is also simplified. The invention also can greatly reduce the cost, improves the reliability of the product, leads the quality of the product to be stable, has more superior electrical performance indexes and actually realizes the high cost performance.
Description
Technical field
The present invention relates to a kind of mechanical tuning broadcast receiver.
Background technology
Broadcasting receiver divides mainly that (1) mechanical tuning adds that full analog receives in the market, (2) electronic tuning adds that full analog receives, (3) electronic tuning adds digital signal processing and receives this receiver of three types.Wherein to debug the loaded down with trivial details production cost of operation higher more for (1) type receiver components and parts.(2) type receiver components and parts are maximum, owing to will cause the design debug production process to increase with independently little process chip (MCU) control, the complete machine cost improves greatly.(3) the present China-made goods that do not have special for the broadcast receiver customization of type receiver chip cause complete machine cost genus the highest owing to also will add independently little process chip control.Existing broadcasting receiver peripheral cell is many, needs the 7-8 procedure to make test and debugging.Because peripheral cell is many, the debugging assembling is more loaded down with trivial details, and a lot of inconsiderate unstable product quality that cause of processing arrangement are done over again often.
Summary of the invention
Technical problem to be solved by this invention is exactly in order to overcome above deficiency, to have proposed the few mechanical tuning broadcast receiver of a kind of peripheral cell.
Technical problem of the present invention is solved by following technical scheme: a kind of mechanical tuning broadcast receiver, comprise signal processor and a transfiguration module, inductance and Frequency Band Selection module, described transfiguration module, inductance links to each other with signal processor respectively with the Frequency Band Selection module, described transfiguration module and inductance vibrate and frequency of oscillation are delivered to signal processor, described Frequency Band Selection module output Frequency Band Selection signal is to signal processor, described signal processor carries out frequency division and obtains intermediate-freuqncy signal with the received signal mixing described frequency of oscillation according to the Frequency Band Selection signal, by frequency discrimination or detection the audio signal in the described intermediate-freuqncy signal is taken out.
Preferably, described transfiguration module comprises a variable capacitor, and the stator of described variable capacitor links to each other with signal processor, moving plate ground connection.
Described transfiguration module comprises a variable capacitance diode, voltage stabilizing circuit, filter capacitor, variable potentiometer, isolation resistance, capacitance; Described variable capacitance diode plus earth, negative electrode link to each other with signal processor through capacitance, described voltage stabilizing circuit input links to each other with the signal processor power port, output is respectively through filter capacitor and variable potentiometer ground connection, and isolation resistance one end links to each other with varactor diode cathode, the other end links to each other with the variable potentiometer sliding end.
Described Frequency Band Selection module comprises first toggle switch, second toggle switch, described first toggle switch has 4 lead-in wires, described 4 lead-in wires link to each other with 4 input ports of signal processor respectively, described 4 ground connection or connect the high resistant open circuit of going between respectively to make up corresponding 12 international VHF bands and medium wave, described second toggle switch has 2 lead-in wires, described 2 lead-in wires link to each other with 2 input ports of signal processor respectively, described 2 lead-in wire ground connection or connect high resistant open circuit to make up corresponding 4 kinds of modulation frequencies.
Described Frequency Band Selection module comprises first contact button, second contact button and logical circuit, described first contact button, second contact button link to each other with logical circuit respectively, and described logical circuit has 6 ports to link to each other with 6 input ports of signal processor respectively; Described first contact button is touched back corresponding first triggering signal of output to logical circuit, logical circuit is exported the corresponding first Frequency Band Selection signal with corresponding 12 international VHF bands and medium wave, described second contact button is touched back corresponding second triggering signal of output to logical circuit, and logical circuit is exported the corresponding second Frequency Band Selection signal with corresponding 4 kinds of modulation frequencies.
Described mechanical tuning broadcast receiver also comprises freq converting circuit, display driver circuit and LCDs, and described display driver circuit is connected between freq converting circuit and the LCDs, and described freq converting circuit also links to each other with signal processor; Signal processor is exported to freq converting circuit with the receive frequency digital signal, and freq converting circuit carries out exporting to display driver circuit after the digital-to-analogue conversion, and the display driver circuit driving display shows receive frequency.
Described mechanical tuning broadcast receiver also comprises AM switch, FM switch, the 7th resistance and the 8th resistance, is provided with the bistable state change-over circuit in the described signal processor; Described AM switch, FM switch, the 7th resistance and the 8th resistance are connected between two trigger ends and ground of described bistable state change-over circuit, and described display driver circuit also links to each other with two trigger ends of bistable state change-over circuit respectively; Described AM switch is pressed back output the 3rd triggering signal to signal processor, signal processor just receives the AM band signal and controls the display driver circuit driving display and shows the AM operating state, described FM switch is pressed back output the 4th triggering signal to signal processor, and signal processor just receives the FM band signal and controls the display driver circuit driving display and shows the FM operating state.
Described mechanical tuning broadcast receiver also comprises AM switch, FM switch, AM light-emitting diode, FM light-emitting diode, is provided with the bistable state change-over circuit in the described signal processor; Described AM switch, FM switch are connected between two trigger ends and ground of described bistable state change-over circuit, and described AM light-emitting diode, FM light-emitting diode are connected between two trigger ends and first resistance of bistable state change-over circuit; Described AM switch is pressed back output the 3rd triggering signal to signal processor, signal processor just receives the AM band signal and controls the AM lumination of light emitting diode, described FM switch is pressed back output the 4th triggering signal to signal processor, and signal processor just receives the FM band signal and controls the FM lumination of light emitting diode.
Be provided with phase-locked loop in the described signal processor, described signal processor detects frequency of oscillation and judges whether frequency of oscillation does not have variation in Preset Time, if then by the described frequency of oscillation of pll lock, if otherwise do not lock.
Described signal processor is an integrated circuit.
The beneficial effect that the present invention is compared with the prior art is: peripheral cell of the present invention is few, and is simple in structure.The present invention only makes test and debugging with 2～3 procedures and gets final product, and debugging saves time.Because plug-in unit is few, debugging is simple, linkage editor is also simplified greatly.The present invention can also reduce cost significantly.The present invention improves, makes constant product quality with product reliability.Electrical performance indexes of the present invention is more superior, and the present invention has really realized high performance-price ratio.
Description of drawings
Fig. 1 is the electrical block diagram of the mechanical tuning broadcast receiver of the specific embodiment of the invention;
Fig. 2 is a kind of electrical block diagram of transfiguration module of the mechanical tuning broadcast receiver of the specific embodiment of the invention;
Fig. 3 is the electrical block diagram of another kind of transfiguration module of the mechanical tuning broadcast receiver of the specific embodiment of the invention;
Fig. 4 is the structural representation of the mechanical tuning broadcast receiver of the specific embodiment of the invention with mechanical indicator indication receive frequency;
Fig. 5 is the mechanical tuning broadcast receiver of the specific embodiment of the invention shows receive frequency with LCDs a electrical block diagram;
Fig. 6 is a kind of electrical block diagram of Frequency Band Selection module of the mechanical tuning broadcast receiver of the specific embodiment of the invention;
Fig. 7 is that the Frequency Band Selection module of the mechanical tuning broadcast receiver of the specific embodiment of the invention is carried out the frequency range schematic diagram that the amplitude modulation broadcasting frequency receives;
Fig. 8 is that the Frequency Band Selection module of the mechanical tuning broadcast receiver of the specific embodiment of the invention is carried out the frequency range schematic diagram that tuned radio frequency receives;
Fig. 9 is the another kind of circuit box structure schematic diagram of Frequency Band Selection module of the mechanical tuning broadcast receiver of the specific embodiment of the invention;
Figure 10 is the electrical block diagram of the mechanical tuning broadcast receiver of the specific embodiment of the invention with the diode displaying operating state;
Figure 11 is the electrical block diagram of the mechanical tuning broadcast receiver of the specific embodiment of the invention with the LCDs display working condition.
Embodiment
Also in conjunction with the accompanying drawings the present invention is described in further details below by concrete execution mode.
As shown in Figure 1, 2, a kind of mechanical tuning broadcast receiver comprises signal processor and transfiguration module, inductance L 2 and a Frequency Band Selection module.Described transfiguration module, inductance L 2 and Frequency Band Selection module link to each other with signal processor respectively.Described transfiguration module and inductance L 2 are vibrated and frequency of oscillation are delivered to signal processor, described Frequency Band Selection module output Frequency Band Selection signal is to signal processor, described signal processor carries out frequency division and obtains intermediate-freuqncy signal with the received signal mixing described frequency of oscillation according to the Frequency Band Selection signal, by frequency discrimination or detection the audio signal in the described intermediate-freuqncy signal is taken out.Described signal processor is integrated circuit (IC).The present invention uses a transfiguration module can realize the FMAM channel selection.To use 3 or above variable capacitance realization broadcast receiver reception and product in the market is minimum.Mechanical tuning broadcast receiver peripheral cell of the present invention is few, simple in structure.
As shown in Figure 2, in one embodiment, described transfiguration module comprises a variable capacitor CT, and the stator of described variable capacitor CT links to each other with signal processor, moving plate ground connection.Rotary variable capacitor CT moving plate can reach the purpose of the tuning channel selection of all band.
As shown in Figure 3, in another embodiment, described transfiguration module comprises a variable capacitance diode D, voltage stabilizing circuit LDO, filter capacitor C1, variable potentiometer RV, isolation resistance R11, capacitance C2.Described variable capacitance diode plus earth, negative electrode link to each other with signal processor through capacitance C2, described voltage stabilizing circuit LDO input links to each other with signal processor power port VBAT, output is respectively through filter capacitor C1 and variable potentiometer RV ground connection, and isolation resistance R11 one end links to each other with varactor diode cathode, the other end links to each other with variable potentiometer RV sliding end.Rotation variable potentiometer RV, its resistance changes, thereby changes the reverse voltage that is added on the variable capacitance diode, also is the corresponding capacity that changes variable capacitance diode, and frequency of oscillation also changes thereupon simultaneously, thereby reaches the purpose of channel selection.Voltage stabilizing circuit LDO can reduce the voltage fluctuation that is added on the variable capacitance diode.When can avoiding variable potentiometer RV to be transferred to little resistance, isolation resistance R11, avoids producing the failure of oscillation phenomenon to the influence of variable capacitance diode quality factor.
As shown in Figure 4, the present invention can indicate the current receive frequency of mechanical tuning broadcast receiver with mechanical indicator.Mechanical tuning broadcast receiver of the present invention comprises tuning knob 90, backguy 91, tuning dish 92 and first pulley 93, second pulley 94 and tuning pointer 95.Described tuning knob 90, tuning dish 92, first pulley 93, second pulley 94 are connected by backguy 91 with tuning pointer 95.Variable capacitor CT or variable potentiometer RV are fixed on the tuning dish 92.During rotary tuning knob 90, drive tuning dish 92 and then drive variable capacitor CT or variable potentiometer RV by backguy 91 and rotate together, drive tuning pointer 95 at last and move, thereby realize indicating intuitively current receive frequency.
As shown in Figure 5, the also available LCDs of the present invention shows the current receive frequency of mechanical tuning broadcast receiver.As shown in Figure 5, mechanical tuning broadcast receiver of the present invention also comprises freq converting circuit, display driver circuit and LCDs.Described display driver circuit is connected between freq converting circuit and the LCDs, and described freq converting circuit also links to each other with signal processor.Signal processor is exported to freq converting circuit with receive frequency digital signal (binary number), (converting metric frequency to) exported to display driver circuit after freq converting circuit carried out digital-to-analogue conversion, and the display driver circuit driving display shows receive frequency.Adopt the iic bus communications protocol of kind of standard between signal processor and the freq converting circuit.
As shown in Figure 1, be provided with phase-locked loop in the described signal processor, described signal processor detects frequency of oscillation and judges whether frequency of oscillation does not have variation in Preset Time (for example 1 second), if then by the described frequency of oscillation of pll lock, if otherwise do not lock.For the embodiment shown in Fig. 2,3, signal processor can detect the capacitance of its 28 pin, and when not changing in 1 second, the phase-locked loop in the signal processor just pins current frequency of oscillation, even if tuning channel selection is finished.If tuning once more channel selection, signal processor will find that the capacitance of 28 pin in 1 second changes, and phase-locked loop will discharge release, can repeat top action again then.The present invention can drift about by strict control frequency, makes it frequency stabilization within very little excursion.Guarantee very little of frequency change.The present invention can avoid because of voltage fluctuation, and variations in temperature and time effect make it frequency and drift about.
As shown in Figure 6, in one embodiment, described Frequency Band Selection module comprises the first toggle switch K1, the second toggle switch K2.The described first toggle switch K1 has 4 lead-in wires, described 4 lead-in wires link to each other with 4 input ports of signal processor respectively, described 4 ground connection or connect the high resistant open circuit of going between respectively to make up corresponding 12 international VHF bands and medium wave, the described second toggle switch K2 has 2 lead-in wires, described 2 lead-in wires link to each other with 2 input ports of signal processor respectively, described 2 lead-in wire ground connection or connect high resistant open circuit to make up corresponding 4 kinds of modulation frequencies.Shown in Fig. 6-9, when the lead-in wire ground connection of toggle switch, be equivalent to 0; Be equivalent to 1 when unsettled (connecing high resistant).Shown in Fig. 6,7,8,4 lead-in wires 0,1 by the first toggle switch K1 change combination can corresponding 12 international VHF bands and medium wave, and concrete frequency division is asked for an interview Fig. 7.Shown in Fig. 7,8,9,0,1 of 2 lead-in wires by the second toggle switch K2 change combination can corresponding 4 kinds of modulation frequencies, and concrete frequency division is asked for an interview Fig. 8.
Certainly also 6 input ports of a plug-in logical circuit control signal processor of available buttons control are avoided the problem of toggle switch feel difference by making up as Fig. 7,8.As shown in Figure 9, in another embodiment, described Frequency Band Selection module comprises the first contact button F1, second contact button F2 and the logical circuit.The described first contact button F1, the second contact button F2 link to each other with logical circuit respectively, and described logical circuit has 6 ports to link to each other with 6 input ports of signal processor respectively.The described first contact button F1 is touched back corresponding first triggering signal of output to logical circuit, logical circuit is exported the corresponding first Frequency Band Selection signal with corresponding 12 international VHF bands and medium wave, the described second contact button F2 is touched back corresponding second triggering signal of output to logical circuit, and logical circuit is exported the corresponding second Frequency Band Selection signal with corresponding 4 kinds of modulation frequencies.Present embodiment can come frequency division with contact button, realizes the purpose of waveband selection.The waveband selection of present embodiment is that folk prescription goes round and begins again to circulation.
As shown in figure 10, in another embodiment, mechanical tuning broadcast receiver of the present invention also comprises AM K switch 3, FM K switch 4, AM light-emitting diode D2, FM light-emitting diode D1.Be provided with the bistable state change-over circuit in the described signal processor.Described AM K switch 3, FM K switch 4 are connected between two trigger ends and ground of described bistable state change-over circuit, and described AM light-emitting diode D2, FM light-emitting diode D1 are connected between two trigger ends and first resistance R 1 of bistable state change-over circuit.Described bistable state change-over circuit comprises the 6th resistance R 6, the 4th resistance R 4, the 5th resistance R 5, second resistance R 2, the 3rd resistance R 3, the first triode Q1 and the second triode Q2.Described AM K switch 3 is pressed back output the 3rd triggering signal to signal processor, signal processor just receives the AM band signal and controls AM light-emitting diode D2 luminous, described FM K switch 4 is pressed back output the 4th triggering signal to signal processor, and signal processor just receives the FM band signal and control FM light-emitting diode D1 luminous.Described first resistance R 1 is a current-limiting resistance.
Mechanical tuning broadcast receiver of the present invention also comprises the 4th capacitor C 4 and the 5th capacitor C 5, prevents AM K switch 3,4 misoperations of FM K switch.Be provided with the bistable state change-over circuit in the signal processor of the present invention, outward element is few, the reliability height.Described AM K switch 3 and FM K switch 4 can be the touch-switchs of supporting often to open with normally closed pattern.
Its operation principle is as follows: when pressing AM K switch 3, and the positive-negative-positive triode Q2 conducting of the bistable state change-over circuit of signal processor inside, 16 pin output high level makes AM light-emitting diode (D2) D2 luminous.Otherwise when pressing the FM switch, the positive-negative-positive triode Q1 conducting of the bistable state change-over circuit of signal processor inside, 15 pin output high level makes FM light-emitting diode (D1) D1 luminous.
As shown in figure 11, in another embodiment, by the LCDs display working condition.Mechanical tuning broadcast receiver of the present invention also comprises AM K switch 3, FM K switch 4, the 7th resistance R 7 and the 8th resistance R 8, is provided with the bistable state change-over circuit in the described signal processor.Described AM K switch 3, FM K switch 4, the 7th resistance R 7 and the 8th resistance R 8 are connected between two trigger ends and ground of described bistable state change-over circuit, and described display driver circuit also links to each other with two trigger ends of bistable state change-over circuit respectively.Described AM K switch 3 is pressed back output the 3rd triggering signal to signal processor, signal processor just receives AM band signal (hereinbefore described 12 international VHF bands and medium wave) and controls the display driver circuit driving display and shows the AM operating state, described FM K switch 4 is touched back output the 4th triggering signal to signal processor, and signal processor just receives FM band signal (hereinbefore described 4 kinds of modulation frequencies) and controls the display driver circuit driving display and shows the FM operating state.
The present invention selects to make broadcast receiver be operated in AM or FM state with AM K switch 3, FM K switch 4, selects a certain wave band with the Frequency Band Selection module, and is tuning with transfiguration module, inductance generation frequency of oscillation.
As shown in Figure 1, the operation principle of signal processor is summarized as follows:
For the FM band signal, its processing procedure is: FM wave band antenna signal reception → antenna port antistatic → frequency modulation analog signal amplifies → by the Frequency Band Selection module to frequency of oscillation carry out frequency division selected and with the FM band signal mixing that receives → according to mixed frequency signal produce intermediate-freuqncy signal and filtering → be subjected to field intensity and the control of automatic gain logic control circuit carry out variable gain amplify → become intermediate frequency frequency-modulated digital signals circuit → frequency modulation digital frequency discrimination output → stereo left and right acoustic channels two railway digitals audio signal transmission → digital audio and video signals prime amplifications → digital audio and video signals revolving die plan audio signal power amplification → loudspeaker that is divided into to convert the electrical signal to sound high dynamic intermediate frequency frequency modulation analog signal conversion.
For the SW band signal, its processing procedure is: SW wave band antenna signal reception → antenna port antistatic → short wave analog signal amplifies → by the Frequency Band Selection module to frequency of oscillation carry out frequency division selected and with the SW band signal mixing that receives → according to mixed frequency signal produce intermediate-freuqncy signal and filtering → be subjected to field intensity and the control of automatic gain logic control circuit carry out variable gain amplify → become intermediate frequency amplitude-moulated digital signal circuit → digital am detection output → filter circuit to carry out filtering → digital audio and video signals prime amplification → digital audio and video signals revolving die plan audio signal power amplification → loudspeaker high dynamic intermediate frequency amplitude modulation analog signal conversion to convert the electrical signal to sound.
For the MW band signal, its processing procedure is: MW wave band magnetic rod antenna signal receives → carries out the tuning adaptive tracing of medium wave analog signal → medium wave analog signal and amplify → by the Frequency Band Selection module to frequency of oscillation carry out frequency division selected and with the MW band signal mixing that receives → according to mixed frequency signal produce intermediate-freuqncy signal and filtering → be subjected to field intensity and the control of automatic gain logic control circuit carry out variable gain amplify → become intermediate frequency amplitude-moulated digital signal circuit → digital am detection output → filter circuit → digital audio and video signals prime amplification → digital audio and video signals revolving die plan audio signal power amplification → loudspeaker to convert the electrical signal to sound high dynamic intermediate frequency amplitude modulation analog signal conversion.
Mechanical tuning broadcast receiver of the present invention realizes that with the method that mechanical tuning adds digitized processing signal receives and the reduction of audio frequency.The technology that signal processor of the present invention is handled with machinery or electronic tuning channel selection digitized signal, audio signal reduction directly drive the loud speaker pronunciation or drive stereophone with smaller power.Frequency modulation shortwave of the present invention is shared the antenna input.The compared with prior art used element of the present invention is few, and debugging is simple, function admirable, and cost is lower.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. mechanical tuning broadcast receiver, it is characterized in that: comprise signal processor and a transfiguration module, inductance and Frequency Band Selection module, described transfiguration module, inductance (L2) links to each other with signal processor respectively with the Frequency Band Selection module, described transfiguration module and inductance (L2) vibrate and frequency of oscillation are delivered to signal processor, described Frequency Band Selection module output Frequency Band Selection signal is to signal processor, described signal processor carries out frequency division and obtains intermediate-freuqncy signal with the received signal mixing described frequency of oscillation according to the Frequency Band Selection signal, by frequency discrimination or detection the audio signal in the described intermediate-freuqncy signal is taken out.
2. mechanical tuning broadcast receiver according to claim 1 is characterized in that: described transfiguration module comprises a variable capacitor (CT), and the stator of described variable capacitor (CT) links to each other with signal processor, moving plate ground connection.
3. mechanical tuning broadcast receiver according to claim 1 is characterized in that: described transfiguration module comprises a variable capacitance diode (D), voltage stabilizing circuit (LDO), filter capacitor (C1), variable potentiometer (RV), isolation resistance (R11), capacitance (C2); Described variable capacitance diode (D) plus earth, negative electrode link to each other with signal processor through capacitance (C2), described voltage stabilizing circuit input links to each other with the signal processor power port, output is respectively through filter capacitor (C1) and variable potentiometer (RV) ground connection, and isolation resistance (R11) end links to each other with variable capacitance diode (D) negative electrode, the other end links to each other with variable potentiometer (RV) sliding end.
4. according to the arbitrary described mechanical tuning broadcast receiver of claim 1-3, it is characterized in that: described Frequency Band Selection module comprises first toggle switch (K1), second toggle switch (K2), described first toggle switch (K1) has 4 lead-in wires, described 4 lead-in wires link to each other with 4 input ports of signal processor respectively, described 4 ground connection or connect the high resistant open circuit of going between respectively to make up corresponding 12 international VHF bands and medium wave, described second toggle switch (K2) has 2 lead-in wires, described 2 lead-in wires link to each other with 2 input ports of signal processor respectively, described 2 lead-in wire ground connection or connect high resistant open circuit to make up corresponding 4 kinds of modulation frequencies.
5. according to the arbitrary described mechanical tuning broadcast receiver of claim 1-3, it is characterized in that: described Frequency Band Selection module comprises first contact button (F1), second contact button (F2) and logical circuit, described first contact button (F1), second contact button (F2) link to each other with logical circuit respectively, and described logical circuit has 6 ports to link to each other with 6 input ports of signal processor respectively; Described first contact button (F1) is touched back corresponding first triggering signal of output to logical circuit, logical circuit is exported the corresponding first Frequency Band Selection signal with corresponding 12 international VHF bands and medium wave, described second contact button is touched back corresponding second triggering signal of output to logical circuit, and logical circuit is exported the corresponding second Frequency Band Selection signal with corresponding 4 kinds of modulation frequencies.
6. according to the arbitrary described mechanical tuning broadcast receiver of claim 1-3, it is characterized in that: also comprise freq converting circuit, display driver circuit and LCDs, described display driver circuit is connected between freq converting circuit and the LCDs, and described freq converting circuit also links to each other with signal processor; Signal processor is exported to freq converting circuit with the receive frequency digital signal, and freq converting circuit carries out exporting to display driver circuit after the digital-to-analogue conversion, and the display driver circuit driving display shows receive frequency.
7. mechanical tuning broadcast receiver according to claim 6 is characterized in that: also comprise AM switch (K3), FM switch (K4), the 7th resistance (R7) and the 8th resistance (R8), be provided with the bistable state change-over circuit in the described signal processor; Described AM switch (K3), FM switch (K4), the 7th resistance (R7) and the 8th resistance (R8) are connected between two trigger ends and ground of described bistable state change-over circuit, and described display driver circuit also links to each other with two trigger ends of bistable state change-over circuit respectively; Described AM switch (K3) is pressed back output the 3rd triggering signal to signal processor, signal processor just receives the AM band signal and controls the display driver circuit driving display and shows the AM operating state, described FM switch (K4) is pressed back output the 4th triggering signal to signal processor, and signal processor just receives the FM band signal and controls the display driver circuit driving display and shows the FM operating state.
8. according to the arbitrary described mechanical tuning broadcast receiver of claim 1-3, it is characterized in that: also comprise AM switch (K3), FM switch (K4), AM light-emitting diode (D2), FM light-emitting diode (D1), be provided with the bistable state change-over circuit in the described signal processor; Described AM switch (K3), FM switch (K4) are connected between two trigger ends and ground of described bistable state change-over circuit, and described AM light-emitting diode (D2), FM light-emitting diode (D1) are connected between two trigger ends and first resistance of bistable state change-over circuit; Described AM switch (K3) is pressed back output the 3rd triggering signal to signal processor, signal processor just receives the AM band signal and controls AM light-emitting diode (D2) luminous, described FM switch (K4) is pressed back output the 4th triggering signal to signal processor, and signal processor just receives the FM band signal and control FM light-emitting diode (D1) luminous.
9. according to the arbitrary described mechanical tuning broadcast receiver of claim 1-3, it is characterized in that: be provided with phase-locked loop in the described signal processor, described signal processor detects frequency of oscillation and judges whether frequency of oscillation does not have variation in Preset Time, if then by the described frequency of oscillation of pll lock, if otherwise do not lock.
10. according to the arbitrary described mechanical tuning broadcast receiver of claim 1-3, it is characterized in that: described signal processor is an integrated circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102412068A CN101499808B (en) | 2008-12-10 | 2008-12-10 | Mechanical tuning broadcast receiver |
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| CN2008102412068A CN101499808B (en) | 2008-12-10 | 2008-12-10 | Mechanical tuning broadcast receiver |
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| CN101499808A true CN101499808A (en) | 2009-08-05 |
| CN101499808B CN101499808B (en) | 2012-11-07 |
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| CN2008102412068A Expired - Fee Related CN101499808B (en) | 2008-12-10 | 2008-12-10 | Mechanical tuning broadcast receiver |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739161A (en) * | 2011-04-11 | 2012-10-17 | 陈建新 | Ring resonator with adjustable broadband frequency |
| US9775200B2 (en) | 2014-02-12 | 2017-09-26 | Philips Lighting Holding B.V. | Illumination system comprising an array of LEDs |
| CN107872753A (en) * | 2016-12-12 | 2018-04-03 | 深圳市蚂蚁雄兵物联技术有限公司 | A kind of FM reception circuit, light fixture and its audio frequency playing method |
| CN107872233A (en) * | 2016-12-12 | 2018-04-03 | 深圳市蚂蚁雄兵物联技术有限公司 | A kind of modulating emission circuit and FM transmission method |
| EP3748877A4 (en) * | 2018-05-18 | 2021-04-14 | Shenzhen Airsmart Technology Co., Ltd. | Interactive device for internet radio station |
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| ES2945749T3 (en) * | 2018-05-18 | 2023-07-06 | Shenzhen Airsmart Tech Co Ltd | Interactive device for internet radio |
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| JP4171869B2 (en) * | 2001-09-05 | 2008-10-29 | ソニー株式会社 | Heterodyne receiver |
| US7272375B2 (en) * | 2004-06-30 | 2007-09-18 | Silicon Laboratories Inc. | Integrated low-IF terrestrial audio broadcast receiver and associated method |
| CN201349210Y (en) * | 2008-12-10 | 2009-11-18 | 深圳市迪斯普科技有限公司 | Mechanically-tuned broadcasting receiver |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739161A (en) * | 2011-04-11 | 2012-10-17 | 陈建新 | Ring resonator with adjustable broadband frequency |
| CN102739161B (en) * | 2011-04-11 | 2015-03-04 | 南通大学 | Ring resonator with adjustable broadband frequency |
| US9775200B2 (en) | 2014-02-12 | 2017-09-26 | Philips Lighting Holding B.V. | Illumination system comprising an array of LEDs |
| CN107872753A (en) * | 2016-12-12 | 2018-04-03 | 深圳市蚂蚁雄兵物联技术有限公司 | A kind of FM reception circuit, light fixture and its audio frequency playing method |
| CN107872233A (en) * | 2016-12-12 | 2018-04-03 | 深圳市蚂蚁雄兵物联技术有限公司 | A kind of modulating emission circuit and FM transmission method |
| EP3748877A4 (en) * | 2018-05-18 | 2021-04-14 | Shenzhen Airsmart Technology Co., Ltd. | Interactive device for internet radio station |
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| CN101499808B (en) | 2012-11-07 |
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